Disregarding zoning laws, it appears it would be better to buy a camper trailer and live in it. At least the camper would be resaleable. If you bought a 10 year old camper it would be even cheaper. An rv, motorhome, would be bigger and is something to consider. But since you are talking a huge city area with crazy laws saying what can and can not be done on a lot be sure to check before ever trying this, or the weehome. You might find that local zoning prohibits both options.